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SubjectRe: uaccess.h reimplementation, patch, 2.1.30

On Mon, 31 Mar 1997, Paul Gortmaker wrote:

> > I'm curious wether the speed/size+cache locality improvement seen by Paul
> > Gortmaker stands for this implementation too.
>
> Okay, as soon as I saw Linus mention the broken WP support, I realized why
> defining access_ok() to 1 was such a gain on i386. [...]

duh for some reason i thought it was an i486.

The code should make the least difference on an i486: no segment
descriptor cache, no branch predicion (which could go wrong), no
aggressive prefetching.

i think if there is any difference visible in macro-benchmarks, then on
P5-s.

-- mingo


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